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Un article trouvé pour ce sujet.
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Two boats |
2001-04-19 |
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Pat pose la question :
Two boats head directly toward each other, one of them traveling 12 miles per hour and the other traveling 17 miles per hour. They begin at a distance of 20 miles from each other. How far apart are they one minute before they collide?
Penny Nom lui répond. |
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